misc/176694: KVM Guest Crash at Boot - kernel trap 12 with interrupts disabled

[Juergen Gotteswinter]

>Number:         176694
>Category:       misc
>Synopsis:       KVM Guest Crash at Boot - kernel trap 12 with interrupts disabled
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Mar 06 15:50:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Juergen Gotteswinter
>Release:        9.0 / 9.1
>Organization:
InterNetX GmbH
>Environment:
not possible, system never booted
>Description:
Trying to Install a 9.0 or 9.1 FreeBSD Guest on a Linux KVM Host ends in the following error message directly after the Boot Menu:

kernel trap 12 with interrupts disabled

Enabling Verbose does not show more Information.

Tried to set hw.mca.enabled=0 and disabled acpi, without effect. Tested FreeBSD 8.3, which works when setting hw.mca.enabled=0.

It seems like this Bug is initially triggered by the Qemu -cpu Parameter, when "-cpu Opteron_G4" is set, this Bug happens.

>How-To-Repeat:
Try to Install a FreeBSD 9.x Guest on a Linux KVM Host with qemu Parameter "-cpu Opteron_G4"

/usr/libexec/qemu-kvm -S -M rhel6.3.0 -cpu Opteron_G4 -enable-kvm -m 4096 -smp 8,sockets=2,cores=4,threads= ....
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: